CN113384026A

CN113384026A - Safety helmet

Info

Publication number: CN113384026A
Application number: CN202010173590.3A
Authority: CN
Inventors: 莫皓然; 韩永隆; 黄启峰; 谢锦文; 林宗义; 古旸; 吕依庭
Original assignee: Microjet Technology Co Ltd
Current assignee: Microjet Technology Co Ltd
Priority date: 2020-03-13
Filing date: 2020-03-13
Publication date: 2021-09-14

Abstract

A safety helmet, comprising: a safety helmet body and a gas detection purifier. The gas detection purifier comprises a body, a purification module, a fan, a gas detection module and a power module. The gas detection module comprises a control circuit board, a gas detection main body, a microprocessor, a communicator and a power supply unit. The gas detection data detected by the gas detection module is operated to control the air guide machine to implement starting or closing operation, the air guide machine implements starting operation to guide gas to enter the machine body and be filtered and purified through the purification module, and finally the gas is discharged to directly correspond to the nose and the mouth of a wearer to provide breath purification gas.

Description

Safety helmet

[ technical field ] A method for producing a semiconductor device

The present invention relates to a safety helmet, and more particularly, to a safety helmet with a gas detecting and purifying device.

[ background of the invention ]

Modern people increasingly attach importance to the requirements of air quality around life, such as carbon monoxide, carbon dioxide, Volatile Organic Compounds (VOC), PM2.5, nitric oxide, sulfur monoxide and other gases, and even particles contained in air, which are exposed to the environment and affect human health, and even seriously harm life. In addition, a locomotive rider, while driving, may be directly affected by the quality of the air in the environment despite wearing a safety helmet. Therefore, the quality of the air is very important for the motorcycle rider, and how to monitor the quality of the air in the environment and purify harmful substances in the air so that the motorcycle rider can still breathe clean air when driving is also a subject of current attention.

Meanwhile, if monitoring information can be provided in real time when the air quality in the environment is monitored, people in a harmful environment can be warned, so that the people can be prevented or escaped in real time, and the influence and the damage to the health caused by exposure to harmful gases in the environment are avoided, so that the air quality monitoring system is very good in application.

[ summary of the invention ]

The main purpose of this case is to provide a safety helmet, can combine gaseous detection clearing machine, for detect and purify the leading-in safety helmet body inside of gas, directly correspond to wearer's nasal part and oral area, let the wearer can directly breathe to purify clean gas, and the gaseous detection module of gaseous detection clearing machine, can detect the inside gas of safety helmet body and obtain gaseous detection data, and do the operation processing control guide fan according to gaseous detection data and implement the purge gas operation of starting or off state, and externally transmit an information and a report warning that obtain gaseous detection data to an external device 3, can detect gas and purify gas and supply the wearer to breathe to purify clean air at any time and anywhere when reaching the safety helmet and supplying to wear.

One broad aspect of the disclosure is a safety helmet comprising: a safety helmet body having a front edge portion corresponding to the nose and mouth of a wearer; a gaseous clearing machine that detects, set up on this safety helmet body leading edge portion, this gaseous clearing machine that detects contains: the gas flow channel is arranged in the machine body and is arranged between the gas inlet and the gas outlet; a purifying module, which is arranged in the gas channel of the machine body to filter a gas introduced by the gas channel; the air guide fan is arranged in the air flow channel of the machine body, is adjacent to one side of the purification module, guides the air to enter from the air inlet and pass through the purification module for filtration and purification, and finally is guided out from the air outlet; a gas detection module, which is arranged in the body and comprises a gas detection main body for detecting the gas introduced from the gas inlet to obtain gas detection data; the power module is arranged in the machine body and is electrically connected with the gas detection module and the air guide machine to provide a starting power supply; the air guide machine performs starting operation to guide the air to enter from the air inlet and pass through the purification module for filtration and purification, and finally is guided out from the air outlet and directly corresponds to the nose and the mouth of a wearer to provide breath purification gas.

[ description of the drawings ]

Fig. 1 is a schematic perspective view of the safety helmet of the present disclosure.

Fig. 2A is a schematic perspective view of a gas detection purifier of the safety helmet.

Fig. 2B is a schematic side sectional view of the gas detection purifier of the safety helmet.

Fig. 2C is a schematic top sectional view of the gas detection purifier of the safety helmet.

FIG. 3A is a schematic cross-sectional view of a purification module formed by the filter unit and the photocatalyst unit in FIG. 2C.

FIG. 3B is a schematic cross-sectional view of the cleaning module formed by the filter unit and the plasma unit in FIG. 2C.

FIG. 3C is a schematic cross-sectional view of the purification module formed by the filter unit and the anion unit in FIG. 2C.

FIG. 3D is a schematic cross-sectional view of the cleaning module formed by the filter unit and the plasma ion unit in FIG. 2C.

Fig. 4 is a schematic sectional view of the gas purge flow direction of the safety helmet.

Fig. 5A is an exploded perspective view of the actuator pump of the present crash helmet.

Fig. 5B is an exploded perspective view of the actuator pump of the safety helmet from another angle.

Fig. 6A is a schematic cross-sectional view of an activation pump of the present headgear.

Fig. 6B is a schematic cross-sectional view of another embodiment of the actuating pump of the safety helmet.

Fig. 6C to 6E are schematic operation diagrams of the actuating pump of the safety helmet.

Fig. 7 is an external perspective view of the gas detection module of the present disclosure.

Fig. 8A is a perspective view of a gas detecting body of the gas detecting module of the present disclosure.

Fig. 8B is a perspective view of the gas detecting body of the gas detecting module at another angle.

Fig. 8C is an exploded perspective view of the gas detection body of the gas detection module according to the present invention.

Fig. 9A is a perspective view of a base of a gas detecting body of the gas detecting module according to the present invention.

Fig. 9B is a perspective view of another angle of the base of the gas detecting body of the gas detecting module of the present disclosure.

Fig. 10 is a perspective view of the base of the gas detecting body of the gas detecting module, which accommodates the laser assembly and the particle sensor.

Fig. 11A is an exploded perspective view of a piezoelectric actuator of a gas detecting body of a gas detecting module according to the present invention, combined with a base.

Fig. 11B is a perspective view of the piezoelectric actuator of the gas detecting body of the gas detecting module according to the present invention combined with the base.

Fig. 12A is an exploded perspective view of a piezoelectric actuator of a gas detection body of a gas detection module according to the present invention.

Fig. 12B is another perspective exploded view of the piezoelectric actuator of the gas detecting body of the gas detecting module according to the present invention.

Fig. 13A is a schematic cross-sectional view illustrating the piezoelectric actuator of the gas detecting body of the gas detecting module of the present invention combined with the gas guide supporting region.

Fig. 13B and 13C are operation diagrams of the piezoelectric actuator of fig. 13A.

Fig. 14A to 14C are schematic gas paths of a gas detection main body of the gas detection module according to the present invention.

Fig. 15 is a schematic diagram of a laser beam path emitted by a laser assembly of the gas detecting body.

Fig. 16 is a block diagram illustrating a configuration relationship between a control circuit board and related components of the gas detection module according to the present invention.

[ detailed description ] embodiments

Exemplary embodiments that embody features and advantages of this disclosure are described in detail below in the detailed description. It will be understood that the present disclosure is capable of various modifications without departing from the scope of the disclosure, and that the description and drawings are to be regarded as illustrative in nature, and not as restrictive.

Referring to fig. 1 and 4, a safety helmet is provided, which mainly comprises a safety helmet body 1 and a gas detection purifier 2. In the embodiment, the external device 3 is disposed on the front edge 11 of the helmet body 1 for detecting and purifying gas introduced into the helmet body 1 to directly correspond to the nose and mouth of the wearer.

Referring to fig. 2A to 2C, in the embodiment of the present invention, the gas detection purifier 2 includes a body 21, a purifying module 22, a blower 23, a gas detection module 24, and a power module 25. The body 21 has at least one inlet 21a, at least one outlet 21b, and a gas flow channel 21c disposed inside the body 21, wherein the gas flow channel 21c is between the inlet 21a and the outlet 21 b. The above-mentioned purification module 22 is disposed in the gas flow passage 21c to filter the gas introduced from the gas flow passage 21 c. The air guiding fan 23 is disposed in the air flow passage 21c and adjacent to one side of the purifying module 22, and guides the air from the air inlet 21a to pass through the purifying module 22 for filtering and purifying, and finally guides the air from the air outlet 21 b. The gas detection module 24 is disposed in the body 21 for detecting the gas introduced from the gas inlet 21a to obtain gas detection data. The power module 25 is disposed in the body 21 and electrically connected to the gas detection module 24 and the air guide 23 to provide a starting power. Thus, the gas detection data obtained by the detection of the gas detection module 24 is processed to control the air guide blower 23 to perform the operation of starting or closing, the air guide blower 23 performs the operation of starting to guide the gas to enter from the air inlet 21a and pass through the purification module 22 for filtration and purification, and finally the purified gas is guided out from the air outlet 21b, so that when the wearer wears the safety helmet body 1, the purified gas is promoted to directly correspond to the nose and the mouth of the wearer to provide the purified gas for respiration.

Referring to fig. 2C and fig. 3A to 3D, the purification module 22 is disposed in the gas channel 21C, which can be implemented in various ways. For example, as shown in FIG. 2C, the purification module 22 can be a screen unit 22 a. When the gas is guided into the gas flow passage 21c under the control of the Air guide fan 23, the chemical smoke, bacteria, dust particles and pollen contained in the gas are adsorbed by the filter unit 22a, so as to achieve the effect of filtering and purifying the guided gas, wherein the filter unit 22a may be one of an electrostatic filter, an activated carbon filter or a High-Efficiency filter (HEPA). In some embodiments, the filter unit 22a may be coated with a layer of cleaning agent of chlorine dioxide (AMS) to inhibit viruses and bacteria in the gas, so that the inhibition rate of influenza a virus, influenza B virus, enterovirus and norovirus is more than 99%, which helps to reduce virus cross infection; in other embodiments, the filter unit 22a may be coated with a herbal protective coating layer containing extracts of ginkgo biloba and japanese sumac, to form a herbal protective anti-allergy filter that is effective in anti-allergy and further destroys the surface proteins of influenza viruses (e.g., H1N1 influenza virus) passing through the filter; in other embodiments, the screen unit 22a may be coated with silver ions to inhibit viruses and bacteria in the gas.

As shown in fig. 3A, the purification module 22 may be in a form of a filter unit 22a matching with a photocatalyst unit 22b, the photocatalyst unit 22b includes a photocatalyst 221b and an ultraviolet lamp 222b, which are respectively disposed in the gas flow channel 21c and maintain a distance therebetween, so that the gas is guided into the gas flow channel 21c by the fan 23, and the photocatalyst 221b is irradiated by the ultraviolet lamp 222b to convert the light energy into chemical energy, thereby decomposing harmful gases and sterilizing the gases, so as to achieve the effect of filtering and purifying the introduced gases.

As shown in fig. 3B, the purifying module 22 may be in a form of a filter unit 22a and a plasma unit 22c, and the plasma unit 22c includes a nano-light tube 221c disposed in the gas flow channel 21 c. When the gas is guided into the gas channel 21c under the control of the air guide fan 23, the nano light tube 221c irradiates the gas to decompose oxygen molecules and water molecules in the gas into highly oxidizing photo plasma, so as to form an ion gas flow capable of destroying Organic molecules, and decompose gas molecules such as Volatile formaldehyde, toluene, and Volatile Organic Compounds (VOC) contained in the gas into water and carbon dioxide, so as to filter and purify the introduced gas.

As shown in fig. 3C, the negative ion unit 22d can be collocated with the filter unit 22a for the purification module 22, the negative ion unit 22d includes at least one electrode line 221d, at least one dust collecting plate 222d and a voltage boosting power supply 223d, each electrode line 221d and each dust collecting plate 222d are disposed in the gas flow channel 21C, the voltage boosting power supply 223d provides high voltage for each electrode line 221d, each dust collecting plate 222d has negative charges, when the gas is guided into the gas flow channel 21C by the air guiding machine 23, the high voltage discharge is performed through each electrode line 221d, so that the particles contained in the gas have positive charges and are attached to each dust collecting plate 222d with negative charges, thereby achieving the effect of filtering and purifying the guided gas.

As shown in FIG. 3D, for cleaning the moldThe block 22 can be a filter unit 22a matched with a plasma unit 22e, and comprises an electric field upper guard net 221e, an adsorption filter net 222e, a high-voltage discharge electrode 223e, an electric field lower guard net 224e and a boosting power supply 225e, wherein the electric field upper guard net 221e, the adsorption filter net 222e, the high-voltage discharge electrode 223e and the electric field lower guard net 224e are arranged in the gas flow passage 21c, the adsorption filter net 222e and the high-voltage discharge electrode 223e are clamped between the electric field upper guard net 221e and the electric field lower guard net 224e, the boosting power supply 225e provides high-voltage electricity for the high-voltage discharge electrode 223e to generate a high-voltage plasma column with plasma, when the gas is guided into the gas flow passage 21c through the water guide fan 23, oxygen molecules contained in the gas and positive ions (H) generated by ionization through the plasma⁺) And an anion (O)₂ ^-) And after the substance with water molecules attached around the ions is attached to the surfaces of the virus and bacteria, the substance is converted into active oxygen (hydroxyl and OH) with strong oxidizing property under the action of chemical reaction, so that hydrogen of the protein on the surfaces of the virus and bacteria is deprived, and the hydrogen is decomposed (oxidative decomposition) so as to filter the introduced gas to achieve the effect of filtering and purifying.

The air guiding device 23 may be a fan, such as a vortex fan, a centrifugal fan, or the like, or the air guiding device 23 shown in fig. 5A, 5B, 6A and 6B may be an actuating pump 23 a. The actuating pump 23a is formed by sequentially stacking a flow inlet plate 231, a resonant plate 232, a piezoelectric actuator 233, a first insulating plate 234, a conductive plate 235 and a second insulating plate 236. The flow inlet plate 231 has at least one flow inlet hole 231a, at least one bus groove 231b and a confluence chamber 231c, the flow inlet hole 231a is used for introducing gas, the flow inlet hole 231a correspondingly penetrates through the bus groove 231b, and the bus groove 231b is confluent to the confluence chamber 231c, so that the gas introduced by the flow inlet hole 231a can be confluent to the confluence chamber 231 c. In the present embodiment, the number of the inflow holes 231a and the number of the bus slots 231b are the same, the number of the inflow holes 231a and the number of the bus slots 231b are 4, and the number of the inflow holes 231a and the number of the bus slots 231b are not limited thereto, the 4 inflow holes 231a penetrate through the 4 bus slots 231b, and the 4 bus slots 231b are merged into the bus chamber 231 c.

Referring to fig. 5A, 5B and 6A, the resonator plate 232 is assembled on the flow inlet plate 231 by a bonding manner, and the resonator plate 232 has a hollow hole 232a, a movable portion 232B and a fixing portion 232c, the hollow hole 232a is located at the center of the resonator plate 232 and corresponds to the collecting chamber 231c of the flow inlet plate 231, the movable portion 232B is disposed at the periphery of the hollow hole 232a and is opposite to the collecting chamber 231c, and the fixing portion 232c is disposed at the outer peripheral edge portion of the resonator plate 232 and is bonded to the flow inlet plate 231.

As shown in fig. 5A, fig. 5B and fig. 6A, the piezoelectric actuator 233 includes a suspension plate 233a, a frame 233B, at least one support 233c, a piezoelectric element 233d, at least one gap 233e and a protrusion 233 f. The suspension plate 233a is in a square shape, the suspension plate 233a is square, and compared with the design of a circular suspension plate, the structure of the square suspension plate 233a has the advantage of power saving, because of the capacitive load operated under the resonant frequency, the power consumption of the square suspension plate 233a increases with the increase of the frequency, and because the resonant frequency of the square suspension plate 233a is obviously lower than that of the circular suspension plate, the relative power consumption is also obviously lower, that is, the square suspension plate 233a has the benefit of power saving; the outer frame 233b is disposed around the outer side of the suspension plate 233 a; at least one bracket 233c is connected between the suspension plate 233a and the outer frame 233b to provide a supporting force for elastically supporting the suspension plate 233 a; and a piezoelectric element 233d having a side length less than or equal to a suspension plate side length of the suspension plate 233a, the piezoelectric element 233d being attached to a surface of the suspension plate 233a for applying a voltage to drive the suspension plate 233a to vibrate in a bending manner; at least one gap 233e is formed among the suspension plate 233a, the outer frame 233b and the support 233c for the gas to pass through; the convex portion 233f is provided on the other surface of the suspension plate 233a opposite to the surface to which the piezoelectric element 233d is attached. In this embodiment, the protrusion 233f may be a protrusion integrally formed on the other surface of the suspension plate 233a opposite to the surface to which the piezoelectric element 233d is attached by an etching process.

As shown in fig. 5A, fig. 5B and fig. 6A, the flow inlet plate 231, the resonator plate 232, the piezoelectric actuator 233, the first insulating plate 234, the conductive plate 235 and the second insulating plate 236 are sequentially stacked and combined, wherein a chamber space 237 needs to be formed between the suspension plate 233a and the resonator plate 232, and the chamber space 237 can be formed by filling a material in a gap between the resonator plate 232 and the outer frame 233B of the piezoelectric actuator 233, for example: the conductive adhesive, but not limited thereto, maintains a certain depth between the resonator plate 232 and the suspension plate 233a to form the cavity space 237, so as to guide the gas to flow more rapidly, and since the suspension plate 233a and the resonator plate 232 maintain a proper distance to reduce the mutual contact interference, the noise generation can be reduced, in another embodiment, the height of the outer frame 233b of the piezoelectric actuator 233 is increased to reduce the thickness of the conductive adhesive filled in the gap between the resonator plate 232 and the outer frame 233b of the piezoelectric actuator 233, so that the overall structural assembly of the actuation pump 23a is not indirectly affected by the thermal compression temperature and the cooling temperature, and the filling material of the conductive adhesive is not affected by the actual distance of the cavity space 237 after molding due to thermal expansion and contraction, but not limited thereto. In addition, the chamber space 237 will affect the delivery performance of the actuation pump 23a, so it is important to maintain a fixed chamber space 237 to provide stable delivery efficiency for the actuation pump 23 a.

Thus, in another embodiment of the piezoelectric actuator 233 shown in fig. 6B, the suspension plate 233a can be formed by stamping to extend outward a distance, and the outward extending distance can be adjusted by at least one bracket 233c formed between the suspension plate 233a and the outer frame 233B, so that the surface of the protrusion 233f on the suspension plate 233a and the surface of the outer frame 233B are both non-coplanar, and a small amount of filling material is applied to the mating surface of the outer frame 233B, for example: the conductive adhesive is used to attach the piezoelectric actuator 233 to the fixing portion 232c of the resonator plate 232 by means of thermal compression, so that the piezoelectric actuator 233 can be assembled and combined with the resonator plate 232, and thus, the structure improvement of the chamber space 237 is directly formed by stamping the suspension plate 233a of the piezoelectric actuator 233, and the required chamber space 237 can be completed by adjusting the stamping distance of the suspension plate 233a of the piezoelectric actuator 233, thereby effectively simplifying the structural design of adjusting the chamber space 237, simplifying the manufacturing process, shortening the manufacturing time, and the like. In addition, the first insulating sheet 234, the conducting sheet 235 and the second insulating sheet 236 are frame-shaped thin sheets, and are sequentially stacked on the piezoelectric actuator 233 to form the overall structure of the actuator pump 23 a.

To understand the output actuation manner of the actuating pump 23a for providing gas transmission, please refer to fig. 6C to 6E, please refer to fig. 6C first, the piezoelectric element 233d of the piezoelectric actuator 233 is deformed to drive the suspension plate 233a to move downward after being applied with the driving voltage, at this time, the volume of the chamber space 237 is increased, a negative pressure is formed in the chamber space 237, so as to draw the gas in the bus chamber 231C into the chamber space 237, and the resonance plate 232 is synchronously moved downward under the influence of the resonance principle, which increases the volume of the bus chamber 231C, and the gas in the bus chamber 231C also has a negative pressure state due to the relationship that the gas in the bus chamber 231C enters the chamber space 237, so as to draw the gas into the bus chamber 231C through the flow hole 231a and the bus groove 231 b; referring to fig. 6D again, the piezoelectric element 233D drives the suspension plate 233a to move upward to compress the chamber space 237, and similarly, the resonator plate 232 is moved upward by the suspension plate 233a due to resonance, so as to force the gas in the chamber space 237 to be pushed synchronously downward and to be transmitted downward through the gap 233e, thereby achieving the effect of transmitting the gas; finally, referring to fig. 6E, when the floating plate 233a returns to the original position, the resonator plate 232 still moves downward due to inertia, and the resonator plate 232 moves the gas in the compression chamber space 237 toward the gap 233E and increases the volume in the confluence chamber 231C, so that the gas can continuously pass through the inflow hole 231a and the confluence groove 231b to be converged in the confluence chamber 231C, and the actuation step provided by the actuation pump 23a shown in fig. 6C to 6E is repeated continuously, so that the actuation pump 23a can make the gas continuously enter the flow channel formed by the inflow hole 231a and the resonator plate 232 to generate a pressure gradient, and then the gas is transmitted downward through the gap 233E, so that the gas flows at a high speed, and the actuation operation of the actuation pump 23a for outputting the transmitted gas is achieved.

As shown in fig. 2B, 2C, 7 and 16, the gas detection module 24 is disposed in the body 21 for detecting the gas inside the helmet body 1 to obtain gas detection data; the gas detection module 24 includes a control circuit board 24a, a gas detection body 24b, a microprocessor 24c, a communicator 24d and a power supply unit 24 e; the gas detection main body 24b, the microprocessor 24c, the communicator 24d and the power supply unit 24e are packaged on the control circuit board 24a to be electrically connected integrally, the power supply unit 24e provides a starting operation power supply for the gas detection main body 24b, so that the gas detection main body 24b detects gas introduced from the outside of the machine body 21 to obtain gas detection data, and the power supply unit 24e can obtain a power supply through being electrically connected with the power supply module 25; the microprocessor 24c receives the gas detection data for operation and controls the on or off state of the air guide 23 to perform gas cleaning operation, and the communicator 24d receives the gas detection data from the microprocessor 24c and transmits the gas detection data to an external device 3, so that the external device 3 obtains information of the gas detection data and a notification alarm. The external device 3 is a mobile device or a cloud processing device.

As also shown in fig. 7, 8A to 8C, 9A to 9B, 10 and 11A to 11B, the gas detecting body 24B includes a base 241, a piezoelectric actuator 242, a driving circuit board 243, a laser module 244, a particle sensor 245 and a cover 246. The base 241 has a first surface 2411, a second surface 2412, a laser installation area 2413, an air inlet groove 2414, an air guide device bearing area 2415 and an air outlet groove 2416, wherein the first surface 2411 and the second surface 2412 are two surfaces arranged oppositely. Laser-disposed region 2413 is hollowed out from first surface 2411 toward second surface 2412. The air inlet groove 2414 is formed recessed from the second surface 2412 and is adjacent to the laser installation area 2413. The cover 246 covers the base 241 and has a side plate 2461, and the side plate 2461 has an inlet frame port 2461a and an outlet frame port 2461 b. The air inlet groove 2414 is provided with an air inlet port 2414a communicating with the outside of the base 241 and corresponding to the air inlet frame port 2461a of the cover 246, and two side walls penetrating a light-transmitting window 2414b communicating with the laser installation area 2413. Therefore, the first surface 2411 of the base 241 is covered by the cover 246 and the second surface 2412 is covered by the driving circuit board 243, so that the air inlet groove 2414 defines an air inlet path (as shown in fig. 10 and 14A).

As shown in fig. 9A to 9B, the air guide device supporting region 2415 is formed by the second surface 2412 being recessed and communicated with the air inlet groove 2414, and a ventilation hole 2415a is formed through the bottom surface. The air outlet groove 2416 is provided with an air outlet port 2416a, and the air outlet port 2416a is disposed corresponding to the air outlet frame port 2461b of the outer cover 246. The air outlet groove 2416 includes a first section 2416b formed by the first surface 2411 being recessed in a vertical projection area corresponding to the air guide device receiving area 2415, and a second section 2416c formed by hollowing out the first surface 2411 to the second surface 2412 in an area extending from the vertical projection area of the non-air guide device receiving area 2415, wherein the first section 2416b and the second section 2416c are connected to form a step, the first section 2416b of the air outlet groove 2416 is communicated with the air hole 2415a of the air guide device receiving area 2415, and the second section 2416c of the air outlet groove 2416 is communicated with the air outlet opening 2416 a. Therefore, when the first surface 2411 of the base 241 is covered by the cover 246 and the second surface 2412 is covered by the driving circuit board 243, the air outlet groove 2416 and the driving circuit board 243 jointly define an air outlet path (as shown in fig. 10 to 14C).

As shown in fig. 8C and 10, the laser unit 244 and the particle sensor 245 are both disposed on the driving circuit board 243 and located in the base 241, and the driving circuit board 243 is omitted from fig. 10 for clarity of explanation of the positions of the laser unit 244, the particle sensor 245 and the base 241. Referring to fig. 8C, 9B and 10, the laser assembly 244 is received in the laser receiving area 2413 of the base 241, and the particle sensor 245 is received in the air inlet groove 2414 of the base 241 and aligned with the laser assembly 244. In addition, the laser module 244 corresponds to the light-transmitting window 2414b, and the light-transmitting window 2414b allows laser light emitted by the laser module 244 to pass therethrough, so that the laser light is irradiated into the air inlet groove 2414. The laser assembly 244 emits a light beam that passes through the light transmissive window 2414b and is orthogonal to the air inlet groove 2414. The laser assembly 244 emits a light beam into the air inlet groove 2414 through the light-transmitting window 2414b, the aerosol contained in the gas in the air inlet groove 2414 is irradiated, the light beam scatters when contacting the aerosol and generates a projected light spot, and the particle sensor 245 receives the projected light spot generated by scattering and calculates to obtain the information related to the particle size and concentration of the aerosol contained in the gas. Wherein the suspended particles contained in the gas comprise bacteria and viruses. Wherein the particulate sensor 245 is a PM2.5 sensor.

As shown in fig. 11A and 11B, the piezoelectric actuator 242 is accommodated in the air guide device supporting area 2415 of the base 241, the air guide device supporting area 2415 is square, four corners of the air guide device supporting area 2415 are respectively provided with a positioning protrusion 2415B, and the piezoelectric actuator 242 is disposed in the air guide device supporting area 2415 through the four positioning protrusions 2415B. In addition, as shown in fig. 9A, 9B, 14B and 14C, the air guide device supporting area 2415 is communicated with the air inlet groove 2414, when the piezoelectric actuator 242 is activated, the air in the air inlet groove 2414 is drawn into the piezoelectric actuator 242, and the air is introduced into the air outlet groove 2416 through the air holes 2415a of the air guide device supporting area 2415.

As shown in fig. 8B and 8C, the cover of the driving circuit board 243 is attached to the second surface 2412 of the base 241. The laser component 244 is disposed on the driving circuit board 243 and electrically connected to the driving circuit board 243. The particle sensor 245 is also disposed on the driving circuit board 243 and electrically connected to the driving circuit board 243. As shown in fig. 8A, when the cover 246 covers the base 241, the inlet frame port 2461a corresponds to the inlet passage 2414A (shown in fig. 14A) of the base 241, and the outlet frame port 2461b corresponds to the outlet passage 2416a (shown in fig. 14C) of the base 241.

As shown in fig. 12A and 12B, the piezoelectric actuator 242 includes a jet hole 2421, a cavity frame 2422, an actuator 2423, an insulating frame 2424 and a conductive frame 2425. The air vent 2421 is made of a flexible material, and has a suspension 2421a and a hollow hole 2421 b. The suspension 2421a is a flexible and vibrating sheet-like structure, and the shape and size thereof substantially correspond to the inner edge of the air guide component bearing area 2415, but not limited thereto, the suspension 2421a may also be one of square, circular, oval, triangular and polygonal; the hollow hole 2421b penetrates the center of the suspension 2421a for air to flow through.

As shown in fig. 12A, 12B and 13A, the cavity frame 2422 is stacked on the vent 2421, and the shape thereof corresponds to the vent 2421. Actuating body 2423 is stacked on cavity frame 2422, and defines a resonant cavity 2426 with cavity frame 2422 and suspension piece 2421 a. An insulating frame 2424 is stacked on the actuator 2423, and has an appearance similar to the cavity frame 2422. The conductive frame 2425 is stacked on the insulating frame 2424, and the appearance of the conductive frame 2425 is similar to that of the insulating frame 2424, and the conductive frame 2425 has a conductive pin 2425a and a conductive electrode 2425b, the conductive pin 2425a extends outward from the outer edge of the conductive frame 2425, and the conductive electrode 2425b extends inward from the inner edge of the conductive frame 2425. In addition, the actuator 2423 further comprises a piezoelectric carrier 2423a, an adjustment resonator 2423b and a piezoelectric plate 2423 c. The piezoelectric carrier 2423a is stacked on the cavity frame 2422. The tuning resonator plate 2423b is supported and stacked on the piezoelectric carrier 2423 a. The piezoelectric plate 2423c is supported and stacked on the tuning resonator plate 2423 b. The tuning resonator plate 2423b and the piezoelectric plate 2423c are accommodated in the insulating frame 2424, and the conductive electrode 2425b of the conductive frame 2425 is electrically connected to the piezoelectric plate 2423 c. The piezoelectric carrier 2423a and the adjustment resonator 2423b are made of conductive materials, the piezoelectric carrier 2423a has a piezoelectric pin 2423d, the piezoelectric pin 2423d and the conductive pin 2425a are connected to a driving circuit (not shown) on the driving circuit board 243 to receive a driving signal (driving frequency and driving voltage), the driving signal can form a loop by the piezoelectric pin 2423d, the piezoelectric carrier 2423a, the adjustment resonator 2423b, the piezoelectric plate 2423c, the conductive electrode 2425b, the conductive frame 2425 and the conductive pin 2425a, and the insulating frame 2424 separates the conductive frame 2425 from the actuator 2423 to prevent short circuit, so that the driving signal can be transmitted to the piezoelectric plate 2423 c. After receiving the driving signal (driving frequency and driving voltage), the piezoelectric plate 2423c generates deformation due to the piezoelectric effect, so as to further drive the piezoelectric carrier 2423a and adjust the resonator plate 2423b to generate reciprocating bending vibration.

As mentioned above, the tuning resonator plate 2423b is located between the piezoelectric plate 2423c and the piezoelectric carrier 2423a, and serves as a buffer therebetween, so as to tune the vibration frequency of the piezoelectric carrier 2423 a. Basically, the thickness of the tuning resonator plate 2423b is larger than that of the piezoelectric plate 2423a, and the tuning resonator plate 2423b can be varied to tune the vibration frequency of the actuator 2423.

As shown in fig. 12A, 12B and 13A, the air injection hole 2421, the cavity frame 2422, the actuator 2423, the insulating frame 2424 and the conductive frame 2425 are correspondingly stacked and disposed in the air guide device supporting region 2415, so that the piezoelectric actuator 242 is supported and positioned in the air guide device supporting region 2415, and the bottom of the piezoelectric actuator 242 is fixed on the positioning protrusion 2415B for supporting and positioning, so that a gap 2421c is defined between the suspension sheet 2421a and the inner edge of the air guide device supporting region 2415 for air to flow through.

Referring to fig. 13A, an air flow chamber 2427 is formed between the air injection hole 2421 and the bottom surface of the air guide module supporting region 2415. The air flow chamber 2427 communicates with the resonance chamber 2426 among the actuator 2423, the cavity frame 2422 and the suspension plate 2421a through the hollow holes 2421b of the air injection hole plate 2421, and the resonance chamber 2426 and the suspension plate 2421a can generate a Helmholtz resonance effect (Helmholtz resonance) by controlling the vibration frequency of the air in the resonance chamber 2426 to be approximately the same as the vibration frequency of the suspension plate 2421a, so that the gas transmission efficiency is improved.

Referring to fig. 13B, when the piezoelectric plate 2423c moves away from the bottom surface of the air guide assembly supporting region 2415, the piezoelectric plate 2423c drives the suspension sheet 2421a of the air vent sheet 2421 to move away from the bottom surface of the air guide assembly supporting region 2415, so as to expand the volume of the air flow chamber 2427 sharply, the internal pressure thereof decreases to form a negative pressure, and the air outside the piezoelectric actuator 242 is sucked into the resonant chamber 2426 through the air gap 2421c and the hollow hole 2421B, so as to increase the air pressure in the resonant chamber 2426 and generate a pressure gradient; as shown in fig. 13C, when the piezoelectric plate 2423C drives the suspension pieces 2421a of the air injection hole pieces 2421 to move toward the bottom surface of the air guide device supporting region 2415, the air in the resonant cavity 2426 flows out through the hollow holes 2421b rapidly, and the air in the air flow cavity 2427 is squeezed, so that the collected air is rapidly and largely injected into the air holes 2415a of the air guide device supporting region 2415 in an ideal air state close to the bernoulli's law. Therefore, by repeating the operations shown in fig. 13B and 13C, the piezoelectric plate 2423C can vibrate in a reciprocating manner, and according to the principle of inertia, when the air pressure inside the exhausted resonance chamber 2426 is lower than the equilibrium air pressure, the gas is guided to enter the resonance chamber 2426 again, so that the vibration frequency of the gas in the resonance chamber 2426 is controlled to be approximately the same as the vibration frequency of the piezoelectric plate 2423C, thereby generating the helmholtz resonance effect, and realizing high-speed and large-volume transmission of the gas.

As also shown in FIG. 14A, the gases enter through the inlet frame port 2461a of the cover 246, enter through the inlet passage 2414A into the inlet channel 2414 of the base 241, and flow to the particle sensor 245. As shown in fig. 14B, the piezoelectric actuator 242 continuously drives the gas sucking the air inlet path to facilitate rapid introduction and stable circulation of the external air, and passes through the upper portion of the particle sensor 245, at this time, the laser module 244 emits a light beam into the air inlet groove 2414 through the light-transmitting window 2414B, the air inlet groove 2414 irradiates the aerosol contained in the air through the air above the particle sensor 245, the light beam scatters and generates a projected light spot when contacting the aerosol, the particle sensor 245 receives the projected light spot generated by scattering and performs calculation to obtain information related to the particle size and concentration of the aerosol contained in the air, and the air above the particle sensor 245 is also continuously driven by the piezoelectric actuator 242 to be transmitted into the air hole 2415a of the air guide module receiving area 2415 and enter the first area 2416B of the air outlet groove 2416. Finally, as shown in fig. 14C, after the gas enters the first section 2416b of the gas outlet groove 2416, since the piezoelectric actuator 242 will continuously deliver the gas into the first section 2416b, the gas in the first section 2416b will be pushed to the second section 2416C, and finally be exhausted through the gas outlet port 2416a and the gas outlet frame port 2461 b.

Referring to fig. 15, the base 241 further includes a light trap region 2417, the light trap region 2417 is formed by hollowing from the first surface 2411 to the second surface 2412 and corresponds to the laser installation region 2413, and the light trap region 2417 passes through the light-transmitting window 2414b so that the light beam emitted by the laser module 244 can be projected therein, the light trap region 2417 is provided with a light trap structure 2417a with a tilted conical surface, and the light trap structure 2417a corresponds to the path of the light beam emitted by the laser module 244; in addition, the light trap structure 2417a enables the projected light beam emitted by the laser component 244 to be reflected into the light trap region 2417 in the inclined cone surface structure, so as to avoid the light beam from being reflected to the position of the particle sensor 245, and a light trap distance D is kept between the position of the projected light beam received by the light trap structure 2417a and the light-transmitting window 2414b, so as to avoid the distortion of the detection precision caused by the direct reflection of excessive stray light to the position of the particle sensor 245 after the projected light beam projected on the light trap structure 2417a is reflected.

As shown in fig. 8C and fig. 15, the gas detecting module 24 of the present disclosure can detect not only particles in the gas, but also characteristics of the introduced gas, such as formaldehyde, ammonia, carbon monoxide, carbon dioxide, oxygen, ozone, and the like. Therefore, the structure of the gas detection module 24 further includes a first voc sensor 247a, the first voc sensor 247a is disposed in a fixed position and electrically connected to the driving circuit board 243, and is accommodated in the air outlet groove 2416 for detecting the gas guided out from the air outlet path, so as to detect the concentration or characteristics of the voc contained in the gas in the air outlet path. Alternatively, the gas detection module 24 further includes a second voc sensor 247b, the second voc sensor 247b is disposed in a fixed position and electrically connected to the driving circuit board 243, and the second voc sensor 247b is accommodated in the light trapping region 2417, so as to measure the concentration or the characteristics of the voc contained in the gas passing through the gas inlet channel 2414 and the light-transmitting window 2414b and introduced into the light trapping region 2417.

In summary, the safety helmet provided by the present disclosure can be combined with a gas detection purifier to introduce a detection and purification gas into the safety helmet body, which directly corresponds to the nose and mouth of a wearer to allow the wearer to directly breathe the purified gas, and a gas detection module of the gas detection purifier can detect the gas inside the safety helmet body to obtain a gas detection data, and perform an operation on the gas detection data to control the fan to perform a gas purification operation in an on or off state, and transmit the gas detection data to an external device to obtain information and a notification alarm of the gas detection data, so that the purpose of detecting the gas and the purification gas at any time and any place for the wearer to breathe the purified gas when the safety helmet is worn is achieved, and the safety helmet has a practical value.

The present invention can be modified by those skilled in the art without departing from the scope of the appended claims.

[ notation ] to show

1: safety helmet body

11: front edge part

2: gas detection purifier

21: machine body

21 a: air inlet

21 b: air outlet

21 c: gas flow channel

22: purification module

22 a: filter screen unit

22 b: photocatalyst unit

221 b: photocatalyst

222 b: ultraviolet lamp

22 c: light plasma unit

221 c: nano light pipe

22 d: anion unit

221 d: electrode wire

222 d: dust collecting plate

223 d: boosting power supply

22 e: plasma cell

221 e: electric field upper protective net

222 e: adsorption filter screen

223 e: high-voltage discharge electrode

224 e: protective net under electric field

225 e: boosting power supply

23: air guide machine

23 a: actuating pump

231: intake plate

231 a: inlet orifice

231 b: bus bar groove

231 c: confluence chamber

232: resonance sheet

232 a: hollow hole

232 b: movable part

232 c: fixing part

233: piezoelectric actuator

233 a: suspension plate

233 b: outer frame

233 c: support frame

233 d: piezoelectric element

233 e: gap

233 f: convex part

234: first insulating sheet

235: conductive sheet

236: second insulating sheet

237: chamber space

24: gas detection module

24 a: control circuit board

24 b: gas detection body

241: base seat

2411: first surface

2412: second surface

2413: laser setting area

2414: air inlet groove

2414 a: air inlet port

2414 b: light-transmitting window

2415: air guide assembly bearing area

2415 a: vent hole

2415 b: positioning lug

2416: air outlet groove

2416 a: air outlet port

2416 b: first interval

2416 c: second interval

2417: light trapping region

2417 a: optical trap structure

242: piezoelectric actuator

2421: air injection hole sheet

2421 a: suspension plate

2421 b: hollow hole

2421 c: voids

2422: cavity frame

2423: actuating body

2423 a: piezoelectric carrier plate

2423 b: tuning the resonator plate

2423 c: piezoelectric plate

2423 d: piezoelectric pin

2424: insulating frame

2425: conductive frame

2425 a: conductive pin

2425 b: conductive electrode

2426: resonance chamber

2427: airflow chamber

243: driving circuit board

244: laser assembly

245: particle sensor

246: outer cover

2461: side plate

2461 a: air inlet frame port

2461 b: air outlet frame port

247 a: first volatile organic compound sensor

247 b: second volatile organic compound sensor

24 c: microprocessor

24 d: communication device

24 e: power supply unit

25: power supply module

3: external device

D: distance of light trap

Claims

1. A safety helmet, comprising:

a safety helmet body having a front edge portion corresponding to a nose portion and a mouth portion of a wearer;

a gaseous clearing machine that detects, sets up on this leading edge portion of this safety helmet body, and this gaseous clearing machine that detects contains:

the gas flow channel is arranged between the gas inlet and the gas outlet;

a purifying module, which is arranged in the gas channel of the machine body to filter a gas introduced by the gas channel;

the air guide fan is arranged in the gas flow channel of the machine body and is adjacently arranged at one side of the purification module;

a gas detection module, which is arranged in the body and comprises a gas detection main body for detecting the gas introduced from the gas inlet to obtain gas detection data;

the power supply module is arranged in the machine body and is electrically connected with the gas detection module and the air guide machine to provide a starting power supply;

the air guide machine performs starting operation to guide the air to enter from the air inlet and pass through the purification module for filtration and purification, and finally, the air is guided out from the air outlet and directly corresponds to the nose and the mouth of a wearer to provide breath purification gas.

2. The safety helmet of claim 1 wherein the purification module is a screen unit.

3. The safety helmet of claim 2 wherein the filter unit is one of an electrostatic filter, an activated carbon filter, and a high efficiency filter.

4. The safety helmet as claimed in claim 2, wherein the filter unit is coated with a layer of cleaning factor of chlorine dioxide to inhibit viruses and bacteria in the gas.

5. The safety helmet of claim 2 wherein said screen element is coated with a herbal protective coating that extracts ginkgo biloba and japanese rhus chinensis to form a herbal protective anti-susceptible screen that is effective in resisting and destroying influenza virus surface proteins that pass through the screen.

6. The safety helmet of claim 2 wherein the screen unit is coated with silver ions to inhibit viruses and bacteria in the gas.

7. The safety helmet as claimed in claim 2, wherein the purifying module is formed by the filter unit and a photocatalyst unit, the photocatalyst unit comprises a photocatalyst and an ultraviolet lamp, the photocatalyst is irradiated by the ultraviolet lamp to decompose and introduce the gas for filtering and purifying.

8. The safety helmet as claimed in claim 2, wherein the purifying module is formed by matching the filter unit with a plasma unit, the plasma unit includes a nano light tube, the gas is irradiated by the nano light tube, and the volatile organic gas contained in the gas is decomposed to purify the introduced gas.

9. The safety helmet as claimed in claim 2, wherein the purification module is formed by matching the filter unit with an anion unit, the anion unit comprises at least one electrode wire, at least one dust collecting plate and a boosting power supply, and the high-voltage discharge of the electrode wire is used for adsorbing particles contained in the introduced gas on the dust collecting plate so as to filter and purify the introduced gas.

10. The safety helmet as claimed in claim 2, wherein the purification module is formed by matching the filter unit with a plasma unit, the plasma unit comprises an electric field upper guard net, an adsorption filter net, a high voltage discharge electrode, an electric field lower guard net and a voltage boosting power supply, the voltage boosting power supply provides high voltage electricity for the high voltage discharge electrode to generate a high voltage plasma column, so that the plasma in the high voltage plasma column decomposes the virus or bacteria introduced into the gas.

11. The headgear of claim 1, wherein the air mover is a fan.

12. The headgear of claim 1, wherein the air mover is an actuation pump.

13. The headgear of claim 12, wherein the actuation pump comprises:

the inflow plate is provided with at least one inflow hole, at least one bus groove and a confluence chamber, wherein the inflow hole is used for introducing the gas, the inflow hole correspondingly penetrates through the bus groove, the bus groove is confluent to the confluence chamber, and the gas introduced by the inflow hole is confluent to the confluence chamber;

a resonance sheet, which is connected on the flow inlet plate and is provided with a hollow hole, a movable part and a fixed part, wherein the hollow hole is positioned at the center of the resonance sheet and corresponds to the confluence chamber of the flow inlet plate, the movable part is arranged at the area around the hollow hole and opposite to the confluence chamber, and the fixed part is arranged at the outer peripheral part of the resonance sheet and is attached on the flow inlet plate; and

a piezoelectric actuator, which is jointed on the resonance sheet and correspondingly arranged;

the resonance plate is provided with a flow inlet hole, a flow outlet hole and a flow inlet hole, wherein a cavity space is arranged between the resonance plate and the piezoelectric actuator, so that when the piezoelectric actuator is driven, the gas is led in from the flow inlet hole of the flow inlet plate, is collected into the flow inlet cavity through the bus groove, flows through the hollow hole of the resonance plate, and is subjected to resonance transmission by the piezoelectric actuator and the movable part of the resonance plate.

14. The headgear of claim 13, wherein the piezoelectric actuator comprises:

a suspension plate having a square shape and capable of bending and vibrating;

an outer frame surrounding the suspension plate;

at least one bracket connected between the suspension plate and the outer frame to provide elastic support for the suspension plate; and

the piezoelectric element is attached to one surface of the suspension plate and used for applying voltage to drive the suspension plate to vibrate in a bending mode.

15. The safety helmet of claim 13, wherein the actuating pump further comprises a first insulating plate, a conductive plate and a second insulating plate, wherein the flow inlet plate, the resonator plate, the piezoelectric actuator, the first insulating plate, the conductive plate and the second insulating plate are sequentially stacked and combined.

16. The headgear of claim 13, wherein the piezoelectric actuator comprises:

a suspension plate having a square shape and capable of bending and vibrating;

an outer frame surrounding the suspension plate;

at least one bracket, which is connected and formed between the suspension plate and the outer frame to provide the suspension plate with elastic support, and a surface of the suspension plate and a surface of the outer frame form a non-coplanar structure, and a cavity space is kept between the surface of the suspension plate and the resonator plate; and

17. The safety helmet of claim 1, wherein the gas detection module further comprises a control circuit board, a microprocessor, a communicator, and a power unit, the gas detection main body, the microprocessor, the communicator and the power supply unit are packaged on the control circuit board to be integrally and electrically connected, the power supply unit is electrically connected with the power supply module and provides a starting operation power supply for the gas detection main body, the gas detection main body detects the gas introduced from the outside of the body to obtain the gas detection data, the microprocessor receives the gas detection data for operation and controls the air guide machine to start or close, and the communicator receives the gas detection data of the microprocessor, and transmits the gas detection data to an external device, and the external device obtains information and a notification alarm of the gas detection data.

18. The headgear of claim 17, wherein the external device is one of a mobile device and a cloud processing device.

19. The safety helmet of claim 1 wherein the gas detection body comprises:

a base having:

a first surface;

a second surface opposite to the first surface;

a laser setting area formed by hollowing from the first surface to the second surface;

the air inlet groove is formed by sinking from the second surface and is adjacent to the laser setting area, the air inlet groove is provided with an air inlet port, and two side walls penetrate through a light-transmitting window and are communicated with the laser setting area;

the air guide assembly bearing area is formed by sinking from the second surface and communicated with the air inlet groove, a vent hole is communicated at the bottom surface, and four corners of the air guide assembly bearing area are respectively provided with a positioning lug; and

an air outlet groove, which is recessed from the first surface to the bottom surface of the air guide assembly bearing area, is formed by hollowing the area of the first surface, which is not corresponding to the air guide assembly bearing area, from the first surface to the second surface, is communicated with the air vent hole, and is provided with an air outlet port;

a piezoelectric actuating element accommodated in the air guide assembly bearing area;

the driving circuit board is attached to the second surface of the base by the sealing cover;

the laser assembly is positioned on the driving circuit board, is electrically connected with the driving circuit board, is correspondingly accommodated in the laser arrangement area, and emits a light beam path which penetrates through the light-transmitting window and forms an orthogonal direction with the air inlet groove;

a particle sensor, which is positioned on the driving circuit board and electrically connected with the driving circuit board, and is correspondingly accommodated at the orthogonal direction position of the light beam path projected by the air inlet groove and the laser component, so as to detect the particles which pass through the air inlet groove and are irradiated by the light beam projected by the laser component; and

an outer cover covering the first surface of the base and having a side plate, the side plate corresponding to the air inlet and outlet ports of the base being respectively provided with an air inlet frame port and an air outlet frame port, the air inlet frame port corresponding to the air inlet of the body and the air outlet frame port corresponding to the air outlet of the body;

the outer cover covers the first surface of the base, and the driving circuit board covers the second surface of the base, so that the air inlet groove defines an air inlet path, the air outlet groove defines an air outlet path, the piezoelectric actuating element accelerates and guides the air outside the air inlet of the machine body to enter the air inlet path defined by the air inlet groove from the air inlet frame port, the particle concentration in the air is detected through the particle sensor, the air is guided and sent through the piezoelectric actuating element, is exhausted into the air outlet path defined by the air outlet groove from the air outlet frame port, and is finally exhausted from the air outlet frame port to the air outlet of the machine body.

20. The safety helmet of claim 19 wherein the base further comprises a light trapping region hollowed out from the first surface toward the second surface and corresponding to the laser-disposed region, the light trapping region having a light trapping structure with a beveled taper disposed corresponding to the beam path.

21. The headgear of claim 20, wherein the light source received by the light trap structure is positioned at a light trap distance from the light transmissive window.

22. The headgear of claim 19, wherein the particulate sensor is a PM2.5 sensor.

23. The headgear of claim 19, wherein the piezoelectric actuation element comprises:

the air injection hole piece comprises a suspension piece and a hollow hole, the suspension piece can be bent and vibrated, and the hollow hole is formed in the center of the suspension piece;

a cavity frame bearing and superposed on the suspension plate;

an actuating body bearing and overlapping on the cavity frame to receive voltage to generate reciprocating bending vibration;

an insulating frame bearing and superposed on the actuating body; and

a conductive frame, which is arranged on the insulating frame in a bearing and stacking manner;

the air injection hole sheet is fixedly arranged in the air guide assembly bearing area and supported and positioned by the positioning lug, a gap is defined between the air injection hole sheet and the inner edge of the air guide assembly bearing area to surround the air for the air to circulate, an air flow chamber is formed between the air injection hole sheet and the bottom of the air guide assembly bearing area, a resonance chamber is formed among the actuating body, the cavity frame and the suspension sheet, the actuating body is driven to drive the air injection hole sheet to resonate, the suspension sheet of the air injection hole sheet is driven to perform reciprocating vibration displacement, the air is attracted to enter the air flow chamber through the gap and then is discharged, and the transmission and flowing of the air are realized.

24. The headgear of claim 23, wherein the actuator comprises:

a piezoelectric carrier plate bearing and superposed on the cavity frame;

the adjusting resonance plate is loaded and stacked on the piezoelectric carrier plate; and

and the piezoelectric plate is loaded and stacked on the adjusting resonance plate to receive voltage to drive the piezoelectric carrier plate and the adjusting resonance plate to generate reciprocating bending vibration.

25. The safety helmet of claim 19, wherein the gas detecting body comprises a first volatile organic compound sensor positioned and electrically connected to the driving circuit board and accommodated in the air outlet groove for detecting the gas guided out of the air outlet path.

26. The safety helmet of claim 20, wherein the gas detecting body comprises a second voc sensor positioned and electrically connected to the driving circuit board and received in the light trapping region for detecting the gas introduced into the light trapping region through the gas inlet path of the gas inlet trench and through the light transmissive window.